FrizzleFried
Well-Known Member
The BoFengs come stock with the #70 jet...I am assuming your at a 3000 ft altitude thereabouts and that your needle valve C clip is at the second notch to the TOP of the needle??? If so, Move it up to the very top notch and see what happens.
One thing I have different on my BoFeng than you do is a much better, non restrictive airfilter that is a no fuss direct replacement for those stock ones...Less restriction, more air, is much better to run at altitude.
Air Filter - Low Profile Chrome
Motorized bicycle, motor bike, electric bike, ebike, pedal assistsickbikeparts.com
You can see it on my motor here below, I'm at 4500 ft.
Gasoline makes all the difference in the world too...I use Ethanol-Free gas which burns and powers much better than the regular gas that now has 15% ethanol.
View attachment 178010
Testing with no air-filter at all. I'm at 2200 ft and run the clip one notch up with the NT (I gain about 5mph going from center to top notch)... the Bofeng doesn't seem to help. Bottom end feels a bit more torque but once I get to about 16mph .... brrrrrrrr.
I wonder if they put a bigger jet in there in error? I'm none-too-keen on the jet kits for this carb either... the best I can find are 5-size increments (though I want to say I read a 2.5/3 size increment source in here somewhere... and at this point it seems (to me) like throwing good money after bad at a problem I really don't seem to have. The NT carb seems to work pretty decently... and do I really want to "chase" that 1mph gain?